I don't know of anybody who has used other than the 6V6 or 6L6 in the amp. I am toying with the idea of securing some of the other tubes and trying them. But then you would have to play with the voltage regulator tubes with each one.

I have noted that with the 6V6 there is wonderful stereo separation and detail; with the 6L6 there is a larger, albeit slightly unfocused sound.

We need someone to undertake trying the Mini with the other 6_6 tubes that will work in it.

Yes, as I currently have a pair of RCA 6Y6ga tubes in my mini torii, they sound every bit as good as my other 6v6 tubes ( about 6 pair including the stock ones. Probably even a bit more dynamic w more punch. You will notice that the amp runs somewhat hotter than w 6V6 tubes, Steve said they will bias a little higher but no worries at all running them...

I also have a set of sylvanias 12AT7 tubes in place of the AU7's.. So I say grab a set off ebay, about 20.00 or 25.00 a pair for nos, very affordable..

we just had a big cook out-fireworks night and about 20 folks gathered around the torii admiring its beauty visually and sound wise, with a few requests to set them up an out door sound system like mine..... ;) Mark

The Mini Torii with the 6Y6's gets very hot, too uncomfortable to touch and hold your finger or hand on the transformers or even the chassis. But the sound is worth it. I got a pair of RCA 6Y6G's from Jim McShane. The 6Y6 has that "punch" that others have described. I am using it with a totally different rectifier, an EZ81 using a 9-pin to 7-pin adapter.

I am into 6K6 territory now. They are cheap as spit ($4.00 for NOS Westinghouse smoked glass or Channel Master gray plate Japanese) and they sound similar to the 6V6. The unit runs cool with them, too.

Soon I will pull out the 6Y6's again and see what rectifier sounds best. I have some 6V4/EZ80's that strike a mid-point between 6CA4/EZ81 and 6X4/EZ90.